US2288635A

US2288635A - Journal bearing

Info

Publication number: US2288635A
Application number: US322075A
Authority: US
Inventors: Lee J Lyons
Original assignee: MAGNUS METAL CORP
Current assignee: MAGNUS METAL Corp
Priority date: 1940-03-04
Filing date: 1940-03-04
Publication date: 1942-07-07
Anticipated expiration: 1959-07-07

Description

July 7,1942. L. J. LYON 2,288,635-

JOURNAL BEARING Filed March 4, 1940 2 s t s 1 l- INVENTOR Law J 0123? L ATTORNEY.

y 1942. L. J. LYONS 2,288,635

' JOURNAL BE RING Filed March 4, 1940 2 Sheets-Sheet 2 h i 1 H V ATTORNEY.

Patented July 7, 1942 JOURNAL BEARING Lee J. Lyons, St. Louis, Mo., assignor to Magnus Metal Corporation, Chicago, 111., a corporation of New York Application March 4, 1940, Serial No. 322,075

2 Claims. (o1. 308-56) This invention relates in general to bearings and more particularly to composite journal bearings having a main body or backing portion of brass, bronze, or other relatively hard metal, and a lining or bearing facing of any suitable type of relative soft bearing metal.

Heretofore, in the use of such ordinary journal bearings, the usual steel collar provided at the outer end of the journal associated therewith has had direct contact with the unfinished end surface of the relatively hard backing portion of the bearing. This has resultedin end heating of the bearing, and cutting, abrasion and wear of the journal collar. The resulting roughening of the collar of the journal causes strands of waste to climb the journal adjacent the collar, and often" develops hot boxes. In addition, contact of the journal collar on the end of the bearing at the line of joinder of the lining and the backing portion, causes penetration of the lubricating oil into the bearing along the'bonded surface between the backing and the lining. This results in cracking and chipping, and eventually failure of. the bearing lining, since substantialy all lubricating oils may contain napthenic and free fatty acids, which have a corrosive effect upon the solder or other bond employed between the backing portion and the lining of the bearing. r I

A principal object of the instant invention, therefore, is the provision at the outer or lug end of a composite journal bearing of a vertically disposed inset in the backing portion of the bearing, for contact with the 'end collar of the journal, which comprises a continuation of the lining portion of the bearing.

Another important object of the invention is the reduction and substantial elimination of end heating of a journal bearing by thev provision of such an insert of relatively soft bearing metal.

A further important object of the invention is to prevent contact of the end collar of the journal with the line of joinder of the lining and the backing portion of the bearing, so that the lubricating oil will not have access to the bonded surface between the backing and the lining from the end of the bearing, thereby eliminatingfailure of. the bearing at such point due to the corrosive action of the. oil upon the bond employed.

Another important object of the invention is to reduce wear andv prevent roughening and abrasion of the end collar of a journal, and to thus reduce the tendency of strands of waste to climb the journal adjacent the collar.

A further important object ofthe invention is to increase the service life of a journal bearing and the journal associated therewith by materially reducing end friction and wear.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which,

when taken in conection with the accompanying drawings, discloses a preferred embodiment thereof.

In the drawings:

Figure 1 is a bottom plan View of a journal bearing embodying the features of the invention;

Figure 2 is a vertical, longitudinal section taken substantially on the line 2--2 of Fig; 1;

Figure 3 is an end elevation of the bearing as it appears from the right end of Figs. 1 and 2;

Figure 4 is a top plan view of a slightly modified form of journal bearing; and

Figure 5 is an end view, similar to Fig, 3, of the modified bearing of Fig. 4.

Referringv more particularly to Figs. 1 to 3 of the drawings, reference numeral ll indicates in general a composite journal bearing made up in the usual manner of a body or backing portion l2 of brass, bronze, or any other relatively hard metal, and a lining portion l3 of any suitable relatively" soft bearing metal, such as Babbitt, Frary metal, Bahnmetall, Satco metal, or the like; Because of its superior impact resisting and wearing qualities, it is preferred that Satco metal be used for the lining [3 of the bearing. As an example, Satco metal may be composed of the following elements in proportions by weight substantially as follows:

Per cent Calcium -3. 0.50

Tin 1.00

Mercury 0.25 Magnesium 0.05

Aluminum 0.03 Lead to make up 100.00

As is usual in this type of composite journal bearing, the-backing portion I2 is provided with a lower concave surface M (Fig; 2) upon which the lining has been found to be harmfully effected by the corrosive action of the acids which may be contained in the lubricating oil employed in conjunction with such a bearing. In the casting of the lining I3 upon the backing portion I2, the lower surface of the former is shaped to substantially conform to the diameter of the particular size of journal with which the bearing is intended to be used. A portion of the journal is shown in broken lines in Fig. 3, and is indicated therein by reference numeral I5. It is also customary to subsequently machine this bearing surface of the lining to facilitate the initial running in of the bearing.

In the use of such a journal bearing, the inner surface of the usual collar provided on the end of the journal l5 (not shown) contacts the outer or lug end of the bearing II, which is the right hand end of the bearing in Figs. 1 and 2. Since this end collar extends beyond the peripheral surface of the journal I5 a distance substantially greater than the thickness of the lining portion I3, its inner vertical surface will come into contact with the unfinished end surface of the relatively hard backing portion I2 of the bearing.

The instant invention contemplates the provision of an insert in the outer or lug end of the bearing, which comprises a continuation of the lining l3, against which the inner surface of the end collar of the journal I5 is adapted to contact. Such an insert is formed by providing an arcuate-shaped recess [6 (Fig. 2) in the outer end of the backing portion I2 and filling the same with the relatively soft bearing metal of the lining portion l3 as the latter is cast upon the body l2. This insert is indicated by reference numeral I! in Figs. 1 to 3, and its outer surface is cast flush with the end surface of the backing portion I2.

The insert II preferably extends substantially a quarter of an inch above the periphery of the collar on the end of the journal I5. As a result, the end collar of the journal will contact only the relatively soft bearing metal employed for the lining l3 of the bearing, so that end heating of the bearing, which normally results in the prior art constructions, is substantially eliminated. Due to the resulting lessening of friction between the end collar of the journal and the outer end of the bearing, wear of the journal and the bearing is materially reduced, and roughening and abrasion of the end collar of the journal is entirely eliminated. In the prior art constructions, when foreign matter becomes lodged between the outer end, of the bearing and the inner surface of the collar on the end of the journal, the latter is roughened and cut, which, in addition to causing end heating of the bearing, also causes strands of waste to climb the journal adjacent the collar. This has been found to be a frequent cause of hot boxes. These undesirable results are prevented by the use of the instant insert I'I, because any foreign material which may be picked up by the collar on the end of the journal will become embedded in the relatively soft metal of the insert. Consequently, such foreign matter serves to polish. the collar, instead of cutting it as it would normally do in a conventional type of hearing.

The insert I! has the additional important advantage of preventing contact of the end collar of the journal I5 with the line. of joinder of the lining l3 and the backing portion I2 of the bearing. As. a result, the lubricating oil that is used in conjunction with such bearings will not have access to the bonded surface I4 between the backing and the lining from the outer end of the bearing. Cracking, chipping, and ultimate failure of the lining at such point, due to the corrosive action of the oil upon the bond employed, is thus entirely eliminated. The material reduction of friction between the collar of the journal and the end of the bearing, in addition to the other advantages of the insert I'I above described, increases the service life of both the bearing and the journal.

In Figs. 4 and 5, a modified type of construc tion is illustrated in which the shape of the soft metal insert at the outer end of the bearing is somewhat altered from that of Figs. 1 to 3. In this modified construction, the bearing is indicated generally by reference numeral 2| and comprises a backing portion 22 and lining 23 which are substantially identical to the members I2 and I3, respectively, of Figs. 1 to 3. The backing portion 22 is provided with a lower concave surface 24, similar to the surface I4 of the body I2, upon which the lining 23 is cast. At its outer or lug end, the backing portion 22 is provided with an arcuate recess 25 which is intended for the same purpose as the recess I6 in the backing portion l2. The upper surface of the recess 26, however, rather than being concentric With the peripheral surface of the journal I5 as is that of the recess I6, is disposed eccentrically thereto, so as to terminate at each side of the bearing at the under surface thereof as shown in Fig. 5. An insert 21 comprising a continuation of the lining 23 is disposed in the recess 26 in the same manner as the insert IT is disposed in the recess I6. However, due to the eccentric curvature of the upper surface of the recess 26, portions of the body 22 of the bearing are left at 28 (Fig. 5) adjacent the lower ends of the recess 26 which are not present in the bearing II of Figs. 1 to 3. These portions 28 of the body 22 of the bearing 2| constitute retaining means for the lower ends of the insert 21. Any tendency of the relatively soft bearing metal of the insert 21 to squeeze out at the edges is thus prevented, and the modification of Figs. 4 and 5 is better adapted than that of Figs. 1 to 3 for bearings which are subjected to particularly severe end thrusts.

In the construction of the above described bearings, the end recesses I5 and 26 may be formed in the casting of the backing portions I2 and 22, or they may be subsequently machined therein, as desired. The advantages hereinbefore described relative to the insert I1 are present to the same degree in the modified construction of Figs. 4 and 5. It will be noted, particularly from Fig. 2, that the inserts II or 21 perform the additional function of aiding in retaining the lining on the backing portion of the bearing.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. A bearing for a journal having a collar on the end thereof, comprising a backing of relatively hard metal having a lower concave surface, a lining of relatively soft metal cast on said concave surface and having a journal engaging surface, said backing being provided with a recess in the outer end thereof, and an insert cast in said recess integrally with said lining for contact with the inner surface of said collar, and to prevent longitudinal fiow of oil between said lining and said backing, the lower edge of said insert having substantially the same radius as the main portion of said journal, and the upper edge of said insert being eccentrically exposed relative to said lower edge and of sufliciently greater radius than the latter to extend beyond the peripheral surface of said collar at all points, thereby preventing any contact between said backing and said collar, said backing having side portions at the bottom thereof to prevent lateral squeezing out of the insert.

2. A bearing for a journal having a collar on the end thereof, comprising a backing of relatively hard metal having a lower concave surface, a lining of relatively soft metal cast on said concave surface and having a journal engaging surface, said backing being provided with a recess in the outer end thereof with an upper surface eccentric to said lower concave surface and spaced therefrom at its upper portion above the peripheral surface of said collar, and an insert disposed in said recess for contact with the inner surface of said collar and formed integrally with said lining, the lower portions of said backing adjacent said recess constituting retaining means for said insert, said insert being of such extent with respect to said collar as to prevent any contact between said collar and said backing.

LEE J. LYONS.